trees

within 25 miles

Apr 23, 2026

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University of Freiburg

3Dtrees.earth

Collect data and tools for LiDAR-based forest monitoring

Anywhere

Ongoing

Citizen ScienceEcology & EnvironmentGeographyComputers & Technologyinventorylidarcomputer visionscanningremote sensingforestdronesmonitoring

Ancient Tree Inventory

To build a living database of ancient trees

Multiple locations, including yours!

Ongoing

Citizen ScienceEcology & EnvironmentNature & OutdoorsBiologytrees, united kingdom

2B Technologies, Inc.

AQTreks (AirQualityTreks)

Monitor air pollution levels and map air pollution around the US

Multiple locations, including yours!

Ongoing

Citizen ScienceNature & OutdoorsGeographyEducationCrowd FundingTransportationEcology & EnvironmentComputers & TechnologyClimate & WeatherChemistryOcean Water Marineinvestigationbicyclingoutdoorsautumnwintercommunity-based monitoringequitycarbon dioxideiphoneparticulate matterhikingweather dataenvironmental justiceenvironmentnatureair qualitygirl scoutsstemclimate monitoringair quality indexec2020climate changeair pollution monitoringglobal warmingdataweatherappsummersmartphone applicationscienceusaspringaircitizen sciencecarbon monoxidedatabaseandroidclimatemobile applicationexperimentair pollution

Arizona State Parks & Trails

Arizona State Parks & Trails: Ethnobotany Guided Hike at Red Rock

Red Rock State Park Arizona

April 26, 2026 at 7:00 AM

CommunityGeneral Science

Arizona State Parks & Trails

Arizona State Parks & Trails: Picnic with the Pendleys

Slide Rock State Park Arizona

April 25, 2026 at 7:00 AM

CommunityGeneral Science

Arizona State University Julie Ann Wrigley Global Futures Laboratory

Arizona State University: Earth Day 2026 – The Future We Build

Rob and Melani Walton Center for Planetary Health Arizona

Ongoing through April 23, 2026 at 6:59 AM

CommunityGeneral Science

NC State University | ecoipm.org | YourWildLife.org

A Tree's Life

To learn how climate & urbanization affect tree growth & health

Multiple locations, including yours!

Ongoing

Citizen ScienceBiologyEducationClimate & WeatherNature & OutdoorsEcology & Environmenturban ecologyclimate changetreescarbon sequestration

Cornell University/New York Department of Environmental Conservation

AVID (Assessing Vegetation Impacts from Deer)

Monitor the effects of deer browsing on woodland trees and plants

Multiple locations, including yours!

Ongoing through November 30, 2030 at 8:35 PM

Citizen ScienceAnimalsEcology & EnvironmentNature & Outdoorswildflowersecologyforestwoodlandstreeswildlifeseedlingsdeerforest health

Airigami

Balloon Breakdown

Help compost 40,000 latex balloons

Multiple locations, including yours!

Ongoing

Citizen ScienceEcology & Environmentcompostballooncompostingballoons

Northern Rivers Fire and Biodiversity Consortium Inc.

Bell Miner Associated Dieback Best Practice Project

Evaluate the removal of mid-storey density in disturbed forests using prescribed fire, weed control and bush regeneration as a method to restore BMAD affected forest.

Anywhere

Ongoing

Citizen ScienceEducationEcology & EnvironmentBirdsaustraliabmad affected forestbird monitoring birds treeslocations of native bell miner coloniesdatagondwana world heritagebell miner associated dieback (bmad)landholderstree health across the northern rivers region of new south wales biodiversity

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